PutImage($biblionumber, $srcimage, $replace);
Stores binary image data and thumbnail in database, optionally replacing existing images for the given biblio.
Retrieves the specified image.
Gets a list of all images associated with a particular biblio.
my ($dberror) = DelImage($imagenumber);
Removes the image with the supplied imagenumber.
C4::Images->NoImage;
Returns the gif to be used when there is no image matching the request, and its mimetype (image/gif).